Q: What are the prime factors of the number 621,500,450?

 A: 2, 5, 17, 19, 29, 1327

Why are those the prime factors of the number 621,500,450?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 621,500,450

621,500,450
Factor Arrows
2310,750,225
Factor Arrows
562,150,045
Factor Arrows
512,430,009
Factor Arrows
17731,177
Factor Arrows
1938,483
Factor Arrows
291,327

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 5, 17, 19, 29, 1327

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 17 x 19 x 29 x 1,327 = 621,500,450

This can also be written as 21 x 52 x 171 x 191 x 291 x 1,3271 = 621,500,450

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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